Regulator for motor-generator systems.



J. A. BEIRNS.

REGULATOR FOR MOTOR QENERATOR SYSTEMS.

APPLICATION FILED JULY 24,1915.

,297,989. Patented Mar. 25, 1919.

2 SHEETS-SHEET I. ,7

fITT'OfP/YEY J. A. BEIRNS,

REGULATOR FOR MOTOR GENERATOR SYSTEMS.

APPLICAUON 'FILED JULY 24.1915

1,297,989. Patented Mar. 2.11.2119.

' 2 SHEETSSHET'2 J? 6 1 f E I 4 I 72 P w 7 m a JOHN A. BEIRNS. OF DETROIT, MICHIGAN.

REGULATOR FOR iroron-ennnnaroa sYsTnMs.

Application filed July 24, 1915.

To all whom it may concern:

Be it known that I, JOHN A. B nrnns, a citizen of the United States, residing at Detroit, county of lVayne, State of ,Michigan, have invented a certain new and'useful Improvement in Regulators for Motor-Generator Systems, and declare the following to be a full, clear, and exact description of the same, such as will enable -others Skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form at art of this specification.

y invention relates to electromagnetic apparatus and a special object of my improvements is to provide an improved magneto generator system for use-with electric starting'fztpparatus for automobiles.

I accomplish this object in the device illustrated in the accompanying drawings in which,

. Figure 1 .is a diagrammatic view of anapparatus embodying my invention and, the circuits in a magneto generator system.

Fig. 2 is a detailview illustrating the construction of one of the magnetic cores.

Fig. 3 illustrates the completed core.

Fig. 4 is an enlarged detail view mostly in section of an apparatus embodyingmy 1nvention.

e is a magnet core. Around this core toward one end thereof is a coil' a. ads a series coil 8 6 and the shunt coil 8 h.- is is a storage battery. The positive pole of the magneto generator is grounded at n and the corresponding pole of the battery at m. The negative pole of the battery is connected through t e starting switch d with the negative pole of the magneto generator through the series coil 8 e. u is a wire leading from the negative pole of the battery to a contact oint of the switch a? and branching ther'e rom by w to the coil 0. From the other contact point of the switch d a wire 9 leads to a contact point at g and connects bya lead wire 1 with the coila which coil is grounded at the other end at t through a lead wire 8. The shunt coil 8 h connects through the lead wire 0 with the positive pole of the magneto generator and by a lead make a contact at j.

Specification of Letters Patent. Patefiijed Mar. 25, 1919.

Serial No. 41,656.

wire-7'5 with the binding post 39 The resistance coil b is connected with p and g by the core 0 to complete a circuit. at

which armature is connected with the lead wire 9 by a wire a and with the lead wire is through the coil 0 and lead wire g is a magnetic core formed into a cylindrical shape and surrounding the coils b '0. it is a regulating armature which normally forms a short circuit between the pointy: and 9 The armature it is adapted to be actuated when the core 9 is magnetized to break the contact at j and interrupt-the short circuit between the point p and. 9 through said armature.

It will be observed that the cylindrical core 9 terminates at one end near one end of the core 6 and at the other end near the center of the core 6. The core 9 is made I position that when the body 9 of the sheet 7 is rolled into an approximately cylindrical form, as shown in Fig. 3, and said lugs bent upward, they will form projections forming the pole pieces of the core in one of'which the armature k may be pivoted and the other of said lugs will act to attract the other end of said armature to break the circuit at j as herein described. The end edges g of the blankg extend at an angle to the other edges as distinctl shown in Fig. 2 so that the pole-pieces will be located at projecting corners where the magnetic flux will tend to concentrate; to is a spring acting to hold the armature. h in position to f is a spring tending to hold the armature f out of contact with z. I

For convenience I will call the armature h a regulating armature and the armature f a cutout armature.

The operation of the above described device is as follows:

When it is desired to start the engine the switch 03 is closed, the current then runs from the battery to the ground, to the positive pole of the magneto generator, through the series coil, and back to the negative pole-of the battery, a current at the same time passin through the shunt coil, the conductor 29',

through the regulating armature h, and to be energized by said coil, an armature through the conductor Q, switch (Z, conductor a back to the negative pole of the battery. When the engine is started the switch 1 is opened and when the speed of the magneto generator has risen so that its voltage as a generator exceeds the voltage of the battery, and to a certain predetermined value, the current from the generator passes to the ground m, to the ground if through the conductor s, coil a, conductors r and Q and the series coil back to the generator, there being also a branch circuit through the shunt coil and regulating armature it, as hereinbefore described. The current passing through the coil a energizes the core 6 which acts upon the cut-out armature f to close the connection at 5 thus short-circuiting the coil a, the current then runs from the magneto to the ground, through the battery, through the conductors u and M the coil 0, the arn'iature ,t' and returns to the magneto. When a current has arrived at a desired value beyond Which it is desired that it should not go, the magnetism due to the coil 0 attracts the armature h breaking the contact at The short circuit of the coil I) being thus-interrupted a larger current is thrown through said coil which acts to diminish the magnet ism of the core 9' and permit the spring 11) to restore the armature i], to its former position again making contact at j. The breaking of the circuit at Very greatly diminishes the current passing through the shunt coil 8 it so that the field circuit is thereby diminished and its production of current lessened. This action occurs repeatedly and very rapidly so that the armature h is in rapid vibration and the current is thereby held at the required value.

If the cylinder 9 is placed over the coil a instead of in the position shown, the voltage, instead of the current Will be regulated.

The cylindrical core 9 may be easily adjusted over any suitable coil Where required and its magnetic flux obtained from the inclosed helix without any additional expenditure of energy.

if is screw threaded rod extending from the armature it. There are nuts it upon said rod and between these nuts is placed a small Weight 7L2 By selecting the weight 72, the rate of vibration of the armature it can be regulated so as to adapt the device to different purposes. While for convenience I refer to the core Within the helix, it is of course obvious that the helix Would operate to a limited extent for the interior magnetic circuit if the interior core were omitted.

What 1 claim is:

1. In an electromagnetic apparatus, a core, an energizing coil surrounding said core, a second core, located at one side of and substantially parallel to the first named core and outside of its energizing coil adapted adapted to be actuated solely by the first named core, and an arn'iature adapted to be actuated solely by said other core.

2. In an electromagnetic apparatus, a core, an energizing coil surrounding said core, a second 'core located at one side of and substantially parallel to the first named core, and outside of its energizing coil and having one of its ends intermediate the ends of the first named core adapted to be energized by said coil, an armature adapted to be actuated by the first named'core, and an armature adapted to be actuated by said other core having a pole located intermediate of the ends of the first named core.

3. In an apparatus of the kind described, a core, a coil surrounding said core, a second core of cylindrical form sleeved over said coil, an armature adapted to be actuated solely by the magnetism of the first named core and an armature adapted to be actuated solely by the magnetism of said other core.

4. In an apparatus of the kind described, a core, a coil surrounding said core, a second core of cylindrical form sleeved over said coil, an armature adapted to be actuated by the magnetism of the first named core and an armature adapted to 'be actuated by the magnetism of said other core, an end of said outer core being intermediate the ends of said inner core and having its armatur. located at said intermediate end.

5. A core consisting of a single sheet of magnetic material bent into the form of a cylinder, the sides of said sheet constituting the end edges of said cylinder and the end edges of said sheet lying adjacent and parallel to each other, a lug turned up from said sheet at the junction of a side and end edge thereof to form a pole piece.

6. A core consisting of a single sheet of magnetic material bent into a circular form in cross section, the sides of said sheet constituting the end edgesrof said cylinder and. the end edges of said sheet lying adjacent and parallel to each other and extending over less than 180 degrees ofthe cylinder so formed, said end edges being at an angle to the side edges so'that they shall lie in a spiral on the cylinder formed.

7 In an, apparatus of the kind described,

a core, an energizing coil surroundingsaid core, a second core of cylindrical form. sleeved over said coil, its inner end extending to a point intermediate the endsof said inner core, an armature adapted to be ac tuated by the magnetism of the first named core, and an-arniature adapted to be actuated by the magnetism of outer core.

8. A hollowcylindrical magnetic core having its Wall continuous from end to end; divided in a'plane oblique to a plane through the axis and at such an angle to the inner end of said the axis that it shall cut the end edges of said wall at points less than 180 degrees from each other.

9. A hollow cylindrical magnetic core havii'ig its wall continuous from end to end divided in a plane oblique to a plane through the axis and at. such an angle to the axis that it shall cut the end edges oi said Wall at points less than 180 degrees from each other, and lugs extending upward from the acute corner of said wall.

10. A core consisting of a single sheet of magnetic material bent into the form of a cylinder, the sides of said sheet constituting the end edges of said cylinder and the end edges of said sheet lying adjacent and parallel to each other, said end edges being at an angle to the side edges so that they shall lie in a spiral on said cylinder, a portion of said magnetic material being turned up to form a. pole at a unction between said side and end edges Where said edges are at an acute angle to each other.

In testimony whereof I sign this specification.

JOHN A. ,BEIRNS. 

